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1. If a toy train has a mass of 1.5 1. If a toy train has a mass of 1.5 kg & accelerates at a rate of 20 kg & accelerates at a rate of 20 m/sm/s22, what is the amount of force , what is the amount of force acting on it?acting on it?

2. Make a Venn diagram 2. Make a Venn diagram comparing/contrasting gravity & comparing/contrasting gravity & friction.friction.

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1. If a toy train has a mass of 1.5 1. If a toy train has a mass of 1.5 kg & accelerates at a rate of 20 kg & accelerates at a rate of 20 m/sm/s22, what is the amount of force , what is the amount of force acting on it?acting on it?

Force = mass x accelerationForce = mass x acceleration

forceforce = 1.5 kg x 20 m/s = 1.5 kg x 20 m/s2230 N = 1.5 kg x 20 = 1.5 kg x 20 m/sm/s22

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2. Make a Venn diagram 2. Make a Venn diagram comparing/contrasting gravity & comparing/contrasting gravity & friction.friction.

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FrictionGravity

Both

•Provides resistance

•2 objects rub against each other

•3 types•Fluid•Sliding•Rolling

•Slows down motion

•Acts in a direction opposite to the objects motion

•Pulls 2 objects together

•Weight = force of gravity

•Speeds up motion

•Forces

•Act on 2 objects

•Have direction

•Accelerate

Newton’s 3Newton’s 3rdrd Law of Motion Law of Motion

If one object exerts a force on If one object exerts a force on another object, then the 2another object, then the 2ndnd object exerts a force of equal object exerts a force of equal magnitude in the opposite magnitude in the opposite direction.direction.

Courtesy of Charlie Sandor